This paper is a technical study of the systematic observations and computations made by Muḥyī al-Dīn al-Maghribī (d. 1283) at the Maragha observatory (north-western Iran, c. 1259–1320) in order to newly determine the parameters of the Ptolemaic lunar model, as explained in his Talkhīṣ al-majisṭī, “Compendium of the Almagest.” He used three lunar eclipses on March 7, 1262, April 7, 1270, and January 24, 1274, in order to measure the lunar epicycle radius and mean motions; an observation on April 20, (...) 1264, to determine the lunar eccentricity; an observation on August 29, 1264, to test the model; and another on March 15, 1262, for measuring the lunar parallax. In the second period of activity at the Maragha observatory, Shams al-Dīn Muḥammad al-Wābkanawī (c. 1254–1320) adopted all of al-Maghribī’s parameter values in his Zīj, but decreased his value for the mean longitude of the moon at epoch by 0;13,11∘\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{\circ }$$\end{document}. By comparing the times of the new moons and lunar eclipses in the period of 1270–1320 as computed from the astronomical tables of the Maragha tradition with the true modern ones, it is argued that this correction was very probably the result of actual observations. (shrink)

In this work the Persian and English texts are edited and published together for the first time. This is Tusi’s major Ismaili work and the most important primary source on Ismaili doctrines during the Alamut period.

Introduces young readers to Ibn Sina, telling his story as he might tell it himself. It provides a fascinating glimpse into the life of this philosopher, scientist and physician who was one of the greatest thinkers of his time.

We argue that there is an incompatibility between the two basic principles of Molinism, i.e., God’s middle knowledge of counterfactuals of creaturely freedom, and divine immutability. To this end, firstly, we set out the difference between strong and weak immutability: according to the latter only God’s essential attributes remain unchanged, while the former affirms that God cannot change in any way. Our next step is to argue that Molinism ascribes strong immutability to God. However, according to Molinism, some counterfactuals of (...) freedom need to be actualized by divine will. We argue that this claim does entail a change in God because it attributes a knowledge to God that involves moving from possibility to actuality through divine will. Therefore, claiming God knows counterfactuals of freedom leads us to reject the strong sense of divine immutability. Further, we argue that assuming God’s knowledge encompasses counterfactuals of freedom cannot be consistent even with weak immutability because, according to Molinism, a change in God’s knowledge requires a change in His essence. We conclude that Molinism is incoherent. (shrink)

This is a major work of Islamic mysticism by the great thirteenth-century Persian poet, Farid al-Din Attar. Translated by A J Arberry, Attar’s work and thought is set in perspective in a substantial introduction.

Code of conduct in society according to Islam.

“Maqamat as-Sufiyya” is a small theoretical works of Shihab ad-Din as-Suhrawardi (ab. 1154-1191), the founder of the Philosophy of Illumination. It contains practical instructions and theoretical reflections and proofs. As-Suhrawardi especially notes terminology used by philosophers and terminology used by sufis in “Maqamat as-Sufiyya”.

The appearance of nonlinear equations in science, engineering, economics, and medicine cannot be denied. Solving such equations requires numerical methods having higher-order convergence with cost-effectiveness, for the equations do not have exact solutions. In the pursuit of efficient numerical methods, an attempt is made to devise a modified strategy for approximating the solution of nonlinear models in either scalar or vector versions. Two numerical methods of second-and sixth-order convergence are carefully merged to obtain a hybrid multi-step numerical method with twelfth-order (...) convergence while using seven function evaluations per iteration, resulting in the efficiency index of about 1.4262. The convergence is also ascertained theoretically, and the asymptotic error constant is computed. Furthermore, various numerical methods of varying orders are used to compare the numerical results obtained with the proposed hybrid method in approximate solution, number of iterations, absolute error, absolute functional value, and the machine time measured in seconds. The obtained results outperformed the chosen methods when applied models arising from physical and natural fields were solved. Finally, to observe the convergence graphically, some complex polynomials are plotted as polynomiographs, wherein the rapid convergence of the proposed method is guaranteed. (shrink)

Islamic thought, no matter what tradition it belonged to, went through a process in which almost all thinkers after the twelfth century were also commentators of Avicenna (d. 428/1037). When this phenomenon combined with Fakhr al-Dīn al-Rāzī's (d. 606/1210) ability to problematize, his critical readings revealed the aporias and turned them into problems which would occupy the thinker’s mind after him and waiting to be solved. The quiddityof knowledge has an important place among these, both in terms of being closely (...) related to many issues where ontology, epistemology and axiology intersect and being a problem area where the Islamic intellectual traditions’ conception of existence is directly reflected. As seen in the analyses of many thinkers, notably Râzî, the ontology, quiddity and category of knowledge in Avicennian philosophy contain elements that are conducive to encountering important challenges when the system as a whole is taken into consideration. Accordingly, scholars like Shams al-Dīn al-Isfahānî (ö. 749/1349), al-Taftāzānī (ö. 792/1390), al-Sayyid al-Sharīf al-Jurjānī (ö. 816/1413), Alî al-Qūshjī (ö. 879/1474), al-Dawwānī (ö. 908/1502), Sadr al-Dīn al-Dashtakī (ö. 903/1498) have taken the discussion to a further point both in terms of identifying the problem and revealing its implications and proposing solutions. This study aims to analyze the sixteenth-century thinker Kutb al-Dīn al-Ījī’s treatment of this problem who inherited the debates of past on the matter in question. He carries out his evaluations especially through the Alī al-Qūshjī (ö. 879/1474), al-Dawwānī (ö. 908/1502) and al-Dashtakī’s comments on the subject. He makes important contributions by analyzing these scholars’ solution offers con-cerning the problem of categorical status of knowledge and putting forward his own approach. He thinks that Alī al-Qūshjī’s distinction between realization (husūl) and subsistence (qiyām), al-Dashtakī’s theory of transformation and al-Dawwānī’s offer to not put the knowledge under the category of quality are problematic from various aspects. (shrink)

Quʹest-ce que lʹêre? Cette question passe pour fonder la philosophie. Encore faut-il s'entendre sur le sens du mot "être ". L'essence des choses détermine-t-elle leur existence? Devons-nous affirmer, au contraire, que l'existence conditionne l'intensité d'être qui qualifie une certaine réalité? Molla Sadr Shirazi, dans ce traité écrit en Iran au siècle de Descartes et de Leibniz, médite ces questions qui sont encore les nôtres. Mais les solutions qu'il propose s'évadent hors de nos perspectives, après avoir opéré une révolution décisive dans (...) la métaphysique des Orientaux. Penseur shi'ite en butte à la persécution, Molla Sadra est la plus haute figure de la philosophie iranienne islamique au temps splendide de la cour safavide d'Ispahan. Sa doctrine du primat de l'existence, que le présent ouvrage expose complètement, ouvre sur une interprétation spirituelle de la résurrection des corps. Cette traduction par Henry Corbin, qui fut aussi l'éditeur du texte original, a fait événement : par son ample introduction, il situe la question de l'être et déploie une explication comparée de ce que l'Occident grec puis médiéval en ont fait, avec la tradition shi'iite. -- Back cover. (shrink)

The central issue in this work is self-knowledge. The human soul is created in the Image of God with a purpose.

يضم هذا الكتاب الأعمال الكاملة لندوة" نحو فلسفة إسلامية معاصرة"، والتي انعقدت لاستجلاء كيفية توظيف الفلسفة الإسلامية فكراً ونظريات ومبادئ ومقاصد في عملية إعادة تشكيل العقل المسلم، ومعالجة الأزمة الفكرية الراهنة لدى المسلمين، وإعادة بناء النسيج الثقافي الإسلامي- لعل هذه الأمة تستعد عافيتها وتسترد قدرتها- فإن هذه الأمة قد تخلفها وفي ابتلائها بالأزمة الفكرية لم يكن وحدها الخاسرة- لكن العالم قد خسر بانحطاطها الكثير.. فأمام علماء المسلمين كمية هائلة من تساؤلات العقل المسلم المعاصر، ومشكلات عويصة بعضها ذات جذور تاريخية ضاربة (...) في القدم تحتاج إلى دراسة وتحليل ولا بد من إعادة تقسيمها وطرحها.. وهذه البحوث والدراسات وإن صدرت متأخرة عن موعد انعقاد الندوة كل هذه الفترة، فإننا نأمل أن تكون قد أسهمت في إيجاد حل لجزء من هذه التساؤلات والمشكلات.. (shrink)

A contemporary to Thomas Aquinas in Latin Catholic Italy, and with a parallel motivation to stabilize each his own civilization in its flux and storm, 'Abd Allah Baydawi of Ilkhan Persia wrote a compact and memorable Arabic Summation of Islamic Natural and Traditional Theology. With the same strokes of his pen he presented the Islamic version of the Science of Theological Statement, bafflingly called "Kalam" while familiarly embracing "Theology". Baydawi's Tawali'al-Anwar min Matal'al-Anzar (Rays of Dawnlight Outstreaming from Far Horizons of (...) Logical Reasoning), with Mahmud Isfahani's commentary, is a formidably clear logical and mental vision of mankind's final completion as a spiritual structure in Islam. Reality - in nature's Possible mode, in an apodictic Divine mode, and in humanity's heroic Prophetic mode - comprises man's Worldview and is the Theme of the Baydawi/Isfahani discourse. The Edifice of Man and Humanity's evanescent Evidence within it are both hugely arresting and moving. The print edition is available as a set of two volumes (9789004121027). (shrink)